Shaving machine



June 17, 1941.

G. F. BAHR sHAvING MACHINE Filed April 2o, 1938 |NVENTC R Fly. 3

Patented June 17, 1941` cette UNITED NSTATES PATENT orifice Gustave F. Bahr, Fairfield. Conn., assigner to Casco Products Corporation. Bridgeport. Conn... v a corporation ot Connecticut application `lun-li zo, im, serai No. 203,029

r schim. (ci. so-iz) i In devices of this kind. where the slots extend through a rather sharp corner so as to be partly in the face and partly4 in the side wall oi the device,y there is greater opportunity for loose skin, especially the skin on theneck, to enter the slots at this sharp corner andbe cut by the inner cutting member. Yet, the providing of the slots so as to be open at both the face and side wall of the outer memberpermits the cutting oi long hairs with greater ease and facility. It also peri5 after appear. v

l mits tougher and flatter skin portions. as on the cheek and lip of a person, to be shaved more closely. i t v An object oi.' this invention is to provide au auxiliary guard member for shaving devices of the type referred to,y which may be quickly and easily slid over the outer member or head to control the skin in the vicinity of the corner` or angie between the face and the side' wall of the head. With the improvement oi this invention-f t "n neroi the'head which it is to shield.

` Fig." 3i: asectional view, showing my improved a plano-convex form. l

the neck, underportion of the chin, and other parts having loose skin, may be shaved with the guard in place, `and then the guard'may be removed to permit close shaving oi the tighter and usually tougher portions of the skin.

In the broader aspects oi this invention, the

` auxiliary guard' member may lie closely adiacent the corner or angle which it is to shields and, in fact, may overlie it entirely if desired. O r, the part of the guard memberadjacent the illary guard is preferably extended beyond adjan cen'tparts so as to facilitate its quick removal.

The present invention also relates to the construction of the/head itself. and is concerned with providing for a very thin cutting portion and a `strong truss-like central portion. For this purpose, the central portion oi the head is made plano-convex so that it gradually thickens from the center outwardly. and preferably the convexl 19 side is outside because the slight protuberance formed thereby, when applied to the face, tends to draw the skin inwardly toward the annular slotted marginal vcrtions.

Other features and advantages will herein- 5gg-shaving device, showing the auxiliary guard 'irieruizier oi the present invention in place theret, Fig. 2 is a vertical section, showing the relation o! the auxiliary guard member to the cor- 4 is a sectional view of a head, and an elevationl in part, oi the rotary cutter member,

showing a modined form of guard ringwherein 'the space between the operative surface of the corner may. be slightly spaced therefrom so as 11M with it! NIPPON" lnd'lmping ring, and a to permit hairs'to enter the slots from the side walls but not spaced enough to permit loose skin to extend into the slots. v

In the forms. oi the invention herein illustrated portion of the rotary cutter, showing a form of 'auxiliary guard wherein the guard is made of sheet metal and has a portion projecting beyond the-clamping ring to permit the easy reby way of example, the auxiliary guards are ap- 40 movai or the Ward.

t tinueddown through the peripheral wall of the head. and cooperating with the head is arotary cutting device having `shearing edges engaging Fig. 6 is aview similar to Fig. 5, but showing the `auxiliary guard member with a portion overlying the corner of the head which it is to shield.

.As above stated, the present invention is illustrated as applied to the type of shaving machine disclosed in my copending application Serial No. 192,765, :lied February 26, 1938. This shaving machine has a body II containing power means, usually in the form of an electric motor, having the head at the interiorof boththe face and side w a drive shaft 1|. dat its upper end has a, holwall portions. l l

The auxiliary guards illustrated herein are accordingly ring shape, and are shaped to slid ingly :lit over the `peripheral wall of the head low circular casing I2 on which is supported a head Il having a flange Il by means of which it is secured to the casing by a flanged ring l5. 'I'he head Il is also hollow and circular, and has Where it is held by friction. Part of the auxa race portion il and side wall portions I1. The

. diametrically across the annular margin of the face portion I 6 is provided with slots I I arranged radially in the form herein illustrated, and these slots also extend through the adjacent side wall portion I'l of the head.

Within the head and casing there is rotatably mounted a cutter member I9 carried by a sleeve 20 rotatably supported in the casing and driven by the shaft II. The cutter member I9, in the form shown, comprises a at strip supported edgewise in slots 2i in the sleeve 20 and extends ead and casing. It is urged upwardly by a spring 22 so that its cutting surfaces 23 will engage the interior surface of the slotted portions of the head and cooperate with the walls of the slots I8 to shear olf hairs extending through the slots.

In the use of this device, as disclosed in my copending application Serial No. 192,765, filed February 26, 1938, hairs may enter the slots both from the face portion I6 and from the side wall portion l'I as the head is traversed over` the surface of the skin to be shaved. The slots in the side wall permit long hairs to enter with great facility, and also permit the hairs on the face, and other parts where the skin is rather tight, to be clipped very short, It may be used with equal facility in shaving the underpart of the chin and the vneck where the skin is tender, but

the skin should be held taut to prevent loose skin from entering the slots at the corner of the head-that is to say, the place where the portion4 or" the slot which is in the face of the head joins AWith the portion of the slot which is in the side 'f'ryall of the head. Ify reasonable care is exercised `in the shaving of the neck with such a device,

danger of cutting the skin of the neck is not imminent.

However, to avoid the necessity of using 'care and of tightening the skin on the neck and other parts where the skin is tender and loose, the present invention provides an auxiliary guard member which may be easily slipped into place when it is desired to shave those parts of the skin and which may be easily removed when'.

shaving the other parts of the skin, Since care and pulling of the iiesh and skin is not necessary when the auxiliary guard of the present invention is employed, the shaving operation may be performed much more rapidly and yet a satisfacv tory shave may be obtained, although, in many instances, the shaving of the tender parts with the auxiliary guard of the present invention will not be quite as close as the shaving of the other parts without the use of the auxihary guard oi this invention.

As shown in Figs. l, 2 and 3, the auxiliary guard may be in the form of a solid ring 26S, the inner surface of which is of such size and shape as to snugly t over the side Walls Si oi the head and substantially cover the side walls. The front surface 25 of the ring is preferably ush with the face I6 of the ring, or atleast the slotted portion thereof,\so that the ring will not interfere with theoperation of pressingthe face portion i6 'of the head close to the skin to be shaved. If desired. the inner portion oi' the ring may be slightly chamfered olf to provide a bevel 2S which will permit the hairs to stand up and be in position to enter the slots i8 in the face of the head as the head progresses over the skin to be shaved.

With the guard ring 25 in place, the angle formed by the annular marginal portion of the head land the side walls cannot press into the skin and allow loose skin to enter the slots suf-,75

ciently to be engaged by the cutter member IS.

In the form of the invention shown in Figs. 1, 2 and 3, it does, however, permit the hairs to enter the slots at the comer between the falce and the side walls.

As shown in Fig. 4, the ring 24 may have a wider bevel 2l which may be used by persons whose skin is not quite so tender and loose, or where the person is willing to exercise greater care in shaving the tender parts of the face, and other parts of the body.

'In the form of the invention shown ln Fig. 5, instead of having it solid, the ring 28 is made of a sheet metal piece having a portion 29 slidably fitting the side walls I1 of the head, and having another portion 30 substantially ush with the face portion I6 of the head. This ring has still another portion in the form of a flange 3l extending beyond the clamping ring I5, so that the guard ring may be easily stripped oif the head when it is desired to remove it.

As shown in Fig. 6, the guard ring 32 is also of sheetmetal, and has a portion 33 slidably ntting the side walls Il of the head, but, instead of the upper portion being spaced from the corner of the face and side walls, it has a flange 31| extending inwardly to cover the corner. The guard ring is comparatively thin and lies substantially in the plane of the face I6 of the head,

`but it positively prevents the slotted corner from being forced into the skin. This form of auxillary guard may be employed Where the skin is so tender that it must not be shaved too closely. The guard ring 33 also has a portion 35 extendlng beyond the clamping ring i6 so that the guard ring may be easily removed from the head.

In the form of the invention herein disclosed, the ring has a bottom portion 36 adapted to engage the top of the clamping ring I5 to thereby determine the normal position of the guard ring on the headthat is to say, that the outer surface of the guard is in predetermined relation to the faceof the cutter. However, if desired, the user may arrange for the outer surface of the ring to project above the face I6 of the head by not pressing the ring all the way on the head.

In my plier application, I have shown the head as in 1, 5E and 3, so as 'to have a een trai depression. Si which may Abe thicker than the cutting portion it. According to present invention, instead of having the central depressed portion Si?, the head may have a raised portion iid shown in Fig. 3. raised portion is preferably convex so as to press into the skin and flesh as the razor is traversedl across the surface being shaved. it is also preferably thicker at the center' than it is at the edges so as to give strength and rigidity to the head, and, as shown, it may be plain convex, having a fiat inner surface 3Q. in this case, so as to avoid the rictional contact of the entire movable blade with the head, the blade d@ has a central concave portion di.

Variations and modifications may be made within the scope of this invention and portions of the improvements may be used without others.

I claim:

l. A shaving machine for personal use comprising a holloar circular head having closely spaced narrow radial hairoreceiving slots in the annular marginal and peripheral wall portions thereof; a support for said head having a threaded portion and a flat end surface for engaging the inner end of the head; a ilange on the head; a clamping ring threaded on said support and asiatico having a flange to engage the flange on the head and secure the headto the support; a rotary cutter mounted within said support and head and having shearing edges cooperating with the interior edges of the walls of said slots in the annular marginal and peripheral wall .portions of the head to shear off hairs extending therethrough; and a guard ring slidably mounted on the Vperipheral wall ofthe head and having an inner. portion engaging said clamping ring to position the same on said peripheral wall, said guard'ring having an outer portion located closely adjacent the junction of the face and the slotted peripheral wall of the head to prevent loose skin from extending into the portions'of the slots in the peripheral wall of the head.

2. A shaving machine for personal use comprising a hollow circular head having closely spaced narrow radialhair-receiving slots in the annular marginal and peripheral. wall portions thereof; a. support for said head having a threaded portion and a flat end sur-face for engaging the inner end of the head; a flange on the head; a clamping ring threaded on said support and having a flange to engage the flange on the head and secure the head to the support; a rotary cutter mounted within said support and head and having shearing edges cooperating with the interior edges of the Walls of said slots in the annular marginal and lperipheral wall portions of the head to shear off hairs extending therethrough; 4and a guard ring slidably mounted on the peripheral Wall of the head and having an inner portion engaging saidclamping ring and an outer portion located closely adjacent the junction of the slotted annular and marginal peripheral wall portions 'of the head to prevent loose skin from extending into the portions of the slots in the peripheral wall of the head, said guard ring having a projecting flange by means of which it may be manually slid on and off the head.

3. A shaving machine for personal use cornprlsing a hollow circular head 'having closely spaced narrow radial hair-receiving slots in the annular marginal and peripheral wall portions thereof; a support for said head having a threaded portion and a flat end surface for engaging the inner end of the head; a flange on the head; a clamping ring threaded on said support and having `a flange to engage the flange on the head and secure the head to the support; a rotary cutter mounted within said support and head and having shearing edges cooperating with the interior edges of the walls of said slots in the annular marginal and peripheral wall portions of the head to shear off hairs extending therethrough; and a guard ring slidably mounted on the peripheral wall of the head and having an inner portion engaging said clamping ring and an outer portion located closely adjacent the junction of the slotted annular and marginal peripheral Wall portions of the head to prevent loose skin from extending into the yportions of the slots in the peripheral wall of the head, said guard ring at its outer end having a projecting flange -by means of which it may be manuallyv slid on and cil the head. l

4. A shaving machine for personal use comprising a hollow circular head having closely spaced narrow radici hair-receiving slots in the annular marginal and peripheral wall portions thereof; a support for said head having a threaded portion and a fiat end surface for engaging the inner end of the head; a flange on the head; a clamping ring threaded on said support and having a flange to engage the flange on the head and secure the head to the support; a rotary cutter mounted within said support and head and having shearing edges cooperating with the interior edges of the Walls of said slots in the annular marginal and peripheral wall portions of the head to shear oil hairs extending therethrough; and a guard ring slidably mounted on the peripheral wall of the head and having an inner portion engaging said clamping ring and an outer portion located closely adjacent thejunction of the slotted annular and marginal peripheral wall portions of the head to prevent loose skin from extending into the portions of the slots in the -peripheral wall of the head, said guard ring at its inner end having a projecting flange 'by means of which it may yloe manuallyslid on and off the head.

5 A shaving machine for personal use comprising aI hollow circular head having closely spaced narrow radial hair-receiving slots in the annular marginal and peripheral wall portions thereof; a support for said head having a threaded portion and a flat end surface .for engaging the inner end of the head; a flange on the head; a clamping ring threaded on said support and having a flange to engage the flange on the head and secure the head to the support; a rotary cutter mounted within said support and head and having shearing edges cooper-ating with the interior edges of the walls of said slots in the annular marginal and peripheral wall .portions of the head to shear off hairs extending `therethrough; and a guard ring slidably mounted on the peripheral wall of the head, said ring having a portion engaging said' clamping ring when mounted on said wall to position a portion thereof so as to lie substantially flush with the face of the head and closely adjacent the slotted peripheral wall thereof to prevent loose skin from extending into the portions of the slots in the .peripheral wall of the head.

6. A shaving machine for personal use comprising a hollow circular head having closely spacednarrow radial hair-receiving slots in the annular marginal and peripheral wall portions thereof; a support for said head having a threaded portion and a flat end surface for engaging the inner end of the head; `a flange onthe head; .a clamping ring threaded on said support and having a flange to engage the flange on the head and secure 'the head to the support; a rotary cutter mounted within said support and head and having shearing edges cooperating with the interior edges of the walls of said slots 1n the annular marginal and peripheral wall portions of the head to shear off hairs extending therethrough; and a guard ring slid-ably mounted on the .peripheral wall ofthe head and having an inner portion engaging said clamping ring and an outer portion overlying the junction of the `face and the slotted peripheral wall of the head to prevent loose skin from extending into the portions of the slot in the Peripheral wall of the head.

GUBTAVE I'. BAER. 

